<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			a:nth-last-of-type(1){ text-decoration: underline;}
			a:nth-last-of-type(2){ text-decoration: overline;}
			a:nth-last-of-type(3){text-decoration: line-through;}
			a:nth-last-of-type(4){ text-decoration: none;}
		</style>
	</head>
	<body>
		<a href="#">下划线：underline</a><br />
		<a href="#">上划线：overline</a><br />
		<a href="#">删除线line-through</a><br />
		<a href="#">无下划线none</a><br />
	</body>
</html>
